bin/build-packages: add check for empty checksum

1 files changed, 1 insertions, 0 deletions

diff --git a/bin/build-packages b/bin/build-packages
index 80e5d5a..3493950 100755
--- a/bin/build-packages
+++ b/bin/build-packages
@@ -564,6 +564,7 @@ while [ "${count}" -ne 0 ] && \
                 mkdir "${package_content_dir}/${pkgfile##*/}"
                 tar -C "${package_content_dir}/${pkgfile##*/}" -xJf "${pkgfile}" 2>/dev/null
                 # we rely on "${checksum}" not appearing in any objdump output
+                : ${checksum?umm, checksum is unset - this will break below sed-fu}
                 find "${package_content_dir}/${pkgfile##*/}" \
                   -name 'opt' -prune , \
                   -type f \